Solve the simultaneous equations by substitution 2x+7y=5 x+y=5

Question

Solve the simultaneous equations by substitution
2x+7y=5
x+y=5

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Thành Đạt 5 years 2021-08-31T06:32:13+00:00 2 Answers 13 views 0

Answers ( )

  1. Eirian
    0
    2021-08-31T06:33:22+00:00
    Reply

    y=-1 and x=6

    followed by the substitution method

  2. ngockhue
    0
    2021-08-31T06:34:06+00:00
    Reply

    Answer:

    x = 6

    y = -1

    Step-by-step explanation:

    i solved the second equation for ‘y’ to get ‘y = 5 – x’

    now i substituted that expression into the first equation for ‘y’

    2x + 7(5 – x) = 5

    2x + 35 – 7x = 5

    -5x = -30

    x = 6

    find ‘y’:

    6 + y = 5

    y = 5 – 6

    y = -1

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